Acoustics. Measurement of the influence of road surfaces on traffic noise - The close-proximity method Ingestion-build-143074 It provides a brief description

It provides a brief description of each method with particular reference to other International Standards where appropriate

The lower limit of to which BS EN ISO 10304-1 applies depends on the matrix and the interferences encountered

A radio transmitter is an electronic circuit that transforms electric power from a power source

designation HR 504A

Acoustics. Measurement of the influence of road surfaces on traffic noise - The close-proximity method Ingestion-build-143074 It provides a brief description1 Scope This document specifies a method of evaluating different road surfaces with respect to their influence on traffic noise, under conditions when tyre road noise dominates. The interpretation of the results applies to free flowing traffic travelling on essentially level roads at constant speeds of 40 km h and upwards, in which cases tyre road noise is assumed to dominate (although in some countries it is possible that tyre road noise does not